| Juncaceae | |
Juncus canadensis fo. apertus
| Fernald | Rhodora 47(556): 129, pl. 882, f. 4–6 | 1945 |
| Juncaceae | |
Juncus canadensis var. brachycephalus
| Engelm. | Manual (ed. 5) 544 | 1867 |
| Juncaceae | |
Juncus canadensis var. brevicaudatus
| Engelm. | Trans. Acad. Sci. St. Louis 2: 436 | 1866 |
| Juncaceae | |
Juncus canadensis fo. canadensis
| | | |
| Juncaceae | |
Juncus canadensis var. canadensis
| | | |
| Juncaceae | |
Juncus canadensis var. coarctatus
| Engelm. | Manual (ed. 5) 544 | 1867 |
| Juncaceae | |
Juncus canadensis fo. conglobatus
| Fernald | Rhodora 47(556): 129–131, pl. 882, f. 7 | 1945 |
| Juncaceae | |
Juncus canadensis var. euroauster
| Fernald | Rhodora 47(556): 127–129, pl. 881, f. 1–3 | 1945 |
| Juncaceae | |
Juncus canadensis var. kuntzei
| Buchenau | Bot. Jahrb. Syst. 12(1–2): 272 | 1890 |
| Juncaceae | |
Juncus canadensis var. longicaudatus
| Engelm. | Manual (ed. 5) 543 | 1867 |
| Juncaceae | |
Juncus canadensis var. paradoxus
| Farw. | Pap. Michigan Acad. Sci. 30: 60 | 1944 [1945] |
| Juncaceae | |
Juncus canadensis var. sparsiflorus
| Fernald | Rhodora 23(274): 241 | 1921 [1922] |
| Juncaceae | |
Juncus canadensis var. subcaudatus
| Engelm. | Manual (ed. 5) 543 | 1867 |
| Juncaceae | ** |
Juncus canadensis var. typicus
| Fernald | Rhodora 47(556): 129 | 1945 |